The Fortune article, which appeared about a week later suspicion of another type of manipulation on Polymarket, cited research by two blockchain analytics firms. One of them, Chaos Labs, “concluded that about a third of the trading volume – and overall users – in the Presidential Market alone was likely wash trading, as well as across all markets.” . The other, Inca Digital, “found that a ‘significant portion of the volume’ in the market could be attributed to possible wash trading,” the magazine said.